Differential Pecl Input; Figure 17. Transmit Eye Diagram; Figure 18. Receive Eye Diagram - Seagate Cheetah ST173404FC Product Manual

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Figure 17 provides the data output valid eye diagram relative to the bit cell time. Table 28 lists the data values.
Figure 17. Transmit eye diagram
9.6.4

Differential PECL input

The serial PECL input signal voltage characteristics are provided in Table 27.
Table 27: Differential PECL input characteristics
Description
Serial input voltage swing
Figure 18 provides the data valid eye diagram for typical and minimum requirements to recover data at the
specified interface error rate. The inputs are AC coupled on the drive. Table 28 lists the data values.
Figure 18. Receive eye diagram
Table 28: Eye diagram data values
Link rate
1 GHz
Bit time 941 ps
XMIT eye 725 ps min.
Typical 659 ps
RCV eye
Minimum 395 ps
Parameter Notes
400 < V < 2.000 mV AC coupled
in
Bit Time
RCV Eye
(minimum)
2 GHz
470 ps
315 ps min.
305 ps
226 ps
Cheetah 73FC Product Manual, Rev. C
Bit Time
XMIT Eye
(typical)